108 



THE ARCTIC FOX. 



CANIS LAG OPUS. 



Canis lagopus, Linneus, Syst. Nat. 12th edit. vol. i. p. 59 (1766) ; 

 Schreber, Saugthiere, Theil iii. p. 262, pis. 93 and 93* ; 

 Shaw, General Zoology, vol. i. p. 326 (1800) ; Desmarest, 

 Mammalogie, p. 202 (1820) ; Tilesius, Nov. Acta Phys.- 

 Med. Acad. Caesar. Leopold. -Carolinse, vol. xi. p. 375 

 (1823) ; Pallas, Zoographia, vol. i. p. 51 (1831) ; Sabine, 

 Supplement Parry's First Voyage, p. 187 ; Harlan, 

 Fauna Americana, p. 92 (1825) ; Wagner, Supplem. 

 Schreber's Saugth., Abth. iii. p. 426 ; Middendorff, Reise 

 aussersten Nordeu u. Osten Sibiriens, Bd. ii. Th. ii. p. 73 

 (1851). 



Canis isatis, Gmelin, Nov. Com. Petrop. vol. v. p. 358. 



Canis ( Vulpes) lagopus, Richardson, Appendix to Capt. Parry's Journal 

 of his Second Voyage, p. 299 (1825) ; id. Fauna Boreali- 

 Americana, vol. i. p. 83 (1829). 



Vulpes lagopus, Audubon & Bachman, Quadrupeds of N. Amer. vol. iii. 

 p. 89, pi. 121 (1820) ; Baird, Mammals North America, 

 p. 137 (1857) ; Fischer & Pelzeln, Internationale Polar- 

 forschung, p. 128 (Vienna, 1886). 



Leucocyon lagopus, Gray, Proc. Zool. Soc. 1868, p. 521 ; id. Cat. Carni- 

 vorous Mammalia, p. 208. 



Renard blanc, Buffon, Hist. Nat. Supplem. vol. vii. p. 218, pi. 51 

 (1789). 



L' Isatis, F. Cuvier, Hist. Nat. des Mammiferes, vol. ii. (two plates) . 



AFTER the doubts and difficulties we have now so many times encoun- 

 tered in endeavouring to determine whether various forms hereinbefore 

 considered were or were not distinct species, it is refreshing to come 

 upon one which stands out in unmistakable distinctness and, indeed, 

 in marked isolation. Not only in coloration and various details of 

 external form, not only in peculiarities of cranial conformation, not 



